C JSON Serialization of Dictionary into key value instead of key key value value

Question

Is it possible to serialize a  Net Dictionary lt Key Value gt  into JSON with DataContractJsonSerializer that is of the format       key0 value0    key1 value1            I use Dictionary  lt K V gt   because there is not predefined structure of the inputs   I m interesting just for DataContractJsonSerializer result  I ve already found a  Surrogate  example  but there is an additional  data  in the output  and if the dictionary  lt K  String gt  is  the escaping is false too     I ve found the solution  what a needed  First of all  a serializable  dictionary  class   Of course  this sample works just in one way  but I dont t need deserialization    Serializable  public class MyJsonDictionary lt K  V gt    ISerializable       Dictionary lt K  V gt  dict   new Dictionary lt K  V gt          public MyJsonDictionary            protected MyJsonDictionary  SerializationInfo info  StreamingContext context             throw new NotImplementedException               public void GetObjectData  SerializationInfo info  StreamingContext context             foreach  K key in dict Keys                 info AddValue  key ToString    dict  key                           public void Add  K key  V value             dict Add  key  value               public V this  K index             set   dict  index     value            get   return dict  index                Usage   public class MainClass       public static String Serialize  Object data             var serializer   new DataContractJsonSerializer  data GetType              var ms   new MemoryStream            serializer WriteObject  ms  data             return Encoding UTF8 GetString  ms ToArray                 public static void Main             MyJsonDictionary lt String  Object gt  result   new MyJsonDictionary lt String  Object gt             result  foo      bar           result  Name      John Doe           result  Age     32          MyJsonDictionary lt String  Object gt  address   new MyJsonDictionary lt String  Object gt             result  Address     address          address  Street      30 Rockefeller Plaza           address  City      New York City           address  State      NY            Console WriteLine  Serialize  result               Console ReadLine              And the result            foo   bar          Name   John Doe          Age  32         Address                type   MyJsonDictionaryOfstringanyType  Json Dictionary Test             Street   30 Rockefeller Plaza             City   New York City             State   NY

User · Answer

Unfortunately  this is not currently possible in the latest version of DataContractJsonSerializer   See  http   connect microsoft com VisualStudio feedback details 558686 datacontractjsonserializer-should-serialize-dictionary-k-v-as-a-json-associative-array  The current suggested workaround is to use the JavaScriptSerializer as Mark suggested above   Good luck

User · Answer

I m using out of the box MVC4 with this code  note the two parameters inside ToDictionary    var result   new JsonResult           Data   new                 partials   GetPartials data Partials  ToDictionary x   gt  x Key  y  gt  y Value               I get what s expected     partials    cartSummary    u003cb u003eCART SUMMARY u003c b u003e        Important  WebAPI in MVC4 uses JSON NET serialization out of the box  but the standard web JsonResult action result doesn t  Therefore I recommend using a custom ActionResult to force JSON NET serialization  You can also get nice formatting  Here s a simple actionresult JsonNetResult  http   james newtonking com archive 2008 10 16 asp-net-mvc-and-json-net aspx  You ll see the difference  and can make sure you re using the right one  when serializing a date   Microsoft way       wireTime     Date 1355627201572        JSON NET way      wireTime   2012-12-15T19 07 03 5247384-08 00

User · Answer

The MyJsonDictionary class worked well for me EXCEPT that the resultant output is XML encoded - so  0  becomes  0030   I am currently stuck at  NET 3 5   as are many others  so many of the other solutions are not available to me   Turns the pictures  upside down and realized I could never convince Microsoft to give me the format I wanted but                    string json   XmlConvert DecodeName xmlencodedJson   TADA  The result is what you would expect to see - regular human readable and non-XML encoded  Works in  NET 3 5

User · Answer

Json NET does this     Dictionary lt string  string gt  values   new Dictionary lt string  string gt     values Add  key1    value1    values Add  key2    value2     string json   JsonConvert SerializeObject values              key1    value1         key2    value2         More examples  Serializing Collections with Json NET

User · Answer

use property UseSimpleDictionaryFormat on DataContractJsonSerializer and set it to true    Does the job

[c#] C# JSON Serialization of Dictionary into {key:value, ...} instead of {key:key, value:value, ...}

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